Refrigerator doorlock



Nov. 8, 1932. J. MILLER REFRIGERATOR DOORLOCK Filed April 15, 1951 R o 5R Mn N: MN EL R W w H f Gov mv R Patented Nov. 8, 1932 r JOSEPH MILLER,or mnmmroms, MINNESOTA REFRIGERATOR DOORLOCK Application filed April 15,

This invention relates to new and useful improvements in refrigeratordoor locks, and an object of the invention is to provide such a deviceof simple and inexpenslve contion of a portion of a truck body and door55 I struction, and which is particularly applicable for use inconnection with the doors of refrigerator truck bodies,

A further object of'the invention is to provide a refrigerator door lockcomprising a base plate adapted to'be secured to asuitable support suchas a refrigerator door, and having spaced apart bearings thereonadaptedto receive a rock shaft provided at one end with a crank, and saidshaftalso 5 having an operating handle whereby it may be convenientlyoperated to actuate the lock and said look also including a keepercomprising a base portion adapted to be secured to a support'such asadoor amb, said keeper having an outwardly projecting web thereonprovided with acam face adapted to be engaged by said crank to therebysecure" the door in locked position, said cam face being "shaped so asto prevent the crank from accidentally becoming disengaged from saidkeeper, when in locked position, and when the vehicle is traveling overrough ground, and means whereby said crank may be locked in engagementwith said cam face to prevent an unauthorized person from opening saidlock.

A further object is to provide a refrigeri ator door lock of simple andinexpensive con-' struction, which is so designed that it cannotaccidentally become unlocked, due to vibration and jarring of the truckbody, when the vehicle is in motion, and also whereby the'door may besecurely locked a against its seat to prevent the circulation of airbetween the door and its seat,

Other objects of the inventionwill appear from the following descriptionandflaccompanying drawing and will be pointed out in the annexed claims.

In the accompanying drawing, therehas been disclosed a structuredesigned to carry out the various objects of the invention, but it is tobe understood that the invention is not confined to the exact featuresshown as 1931. Serial No. 530,305.

various changes may be made within the scope ofthe claims which follow.

In the drawing: 3

Figure 1 is a view showing a front elevawith my improved lock appliedthereto;

Figure 2 is a vertical sectional view on the line 2-2 of Figure 1,showing the operating lever and the means whereby said lever may belocked in door closing position;

Figure 3 is a plan view of Figure 1;

Figure 4 is a detail sectional view on the v line 44 of Figure 1; and

Figure'5 is a detail sectional view onthe line 5-5 of Figure 1. v

Thenovel lock featured in this invention, ,7 comprises a base plate 2providedwith suit able apertures whereby itmay be securedto a supportsuch, for example, as the surface of a door 3, by such means as bolts orrivets 4. The base plate 2 is provided with abearing 5 shown integrallyformed therewith, and a bearing 6' which is secured to the base plate 2by means of rivets or bolts 7. The bearing 6 is shown comprising a cap8, U-shaped in configuration, and adapted to be fitted over 1 a raisedportion 9 provided upon the base 2. The cap 8 has oppositely extendingstrap portions 11 adapted to be seated upon the base 2 and havingapertures therein alined with the apertures in the base adapted toreceive the rivets 7 as shown in Figure 4. The projection 9 on the base2 is provided with a rounded seat which cooperates with the interior ofthe cap 8to provide a bore 12 adapted toreceive one end of a rock shaft13, which will next bedescribed; I

The'rock shaft 13 is supported in the bearings5 and 6 and has a crankpin 14 provided at one end thereof, as shown in the drawing; Thebearings are spaced apart as shown in Figure 1, and an operating handle15 is secured to the rock shaft between the bearings and has an endportion 16 adapted to engage a plate 17 having an eye or staple 18adapted to be received in an elongated aper-- ture or slot 19 providedin the end portion 16 of the operating handle 15. This staple extendsthrough the aperture 19 to provide means for receiving an ordinary lock,where-h by the operating handle may be locked in the position shown inFigures 1 and 2.

A keeper comprising a base portion 21 is adapted to be secured to thedoor jamb and has an outwardly projecting web portion 22 provided with acam face 23 adapted to be engaged by the crank pin 14, as shown inFigures 2 and 5. The cam face 23 is provided with a low portion 24adapted to engage the crank pin 14 when the operating lever is in thefull line position in Figures 1 and 2, whereby the cam will tend toretain the operating lever in such position that it cannot accidentallymove into unlocking position.

An aperture 25is provided in the out wardly projecting web 22 of thekeeper adapted to receive an ordinary padlock 26,

as shown in Figures 3 and 5, whereby the crank pin cannot be moved outof engagement with the keeper to permit unauthorized opening of thedoor. The keeper is secured to the door 27, as show i The novel lockfeatured in this invention is particularly well adapted for use inconnection with doors of refrigerator truck bodies. The cam face 23 isso designed that when the' lo ck is in door-closing position, it

cannot accidentally become unlocked, due

to vibration and jarring of the vehicle-body. The cam'will also causethe door to be held tightly against its seat, regardless of twisting ortorsional strains imparted to the veihicle body. To open the lock, theoperating lever is swung upwardly to the dotted line position, shown inFigure 2, whereby the crank pin will be moved to an'elevation above theupper edge 28 of the cam 23, so that the d'cra'nk pm may pass over thisedge. To look the door, the door is moved into engagement with its seatwhile the operating handle is held in an elevated position, and theoperating lever is then moved downwardly ""fro'm the dotted to the fullline position,

shown in Figure 2, whereupon the crank pin 14 will engage the cam face23 and tightly force the door into engagement with its seatl When thecrankpin reaches the low spot 24 0 in the cam, shown in full lines inFigure 2,

it will remain in such position and thereby prevent the look fromaccidentally opening. The construction of the lock is very simple andinexpensive and requires very little machine work to finish it.

It is preferably made of cast metal and because of the cap 6 beingdetachably secured to the base, as shown in Figure 4, the rock shaft maybe engaged with the bearing in position over the'raised portion 9 of thebase, whereby a very substantial support is provided for the rock shaft,and whereby strains and other abuses to which locks of this'characterare usually subjected, will not 7 effect the operation of the lock.

jamb'by suitable bolts or rivets 5, after which the cap 6 is secured vonsaid Web adapted to be engaged by said crank pin whereby the door may beforced onto itsseat by manipulation of said handle, said cam alsofunctioning to retain the crank in door-locking position.

2. A refrigerator door lock comprising a crank, a supporting shafttherefor, a base plate having bearings thereon adapted to receiveandsupport said shaft, an operating handle secured to the shaft wherebysaid crank may be operated, a keeper comprising a base plate having anoutwardly projecting web thereon provided with an aperture adapted toreceive a padlock, a cam face also on said flange adapted to be engagedby said crank to lock the 'door in closed position, said cam face havinga depression therein adapted to be engaged by said crank, when the dooris in locked position, to prevent s aid crank from accidentally becomingdisengaged from the cam.

'3. A refrigerator door lock comprising a crank, a support ng shafttherefor, a base plate, a bearing fixed to said base plate and adaptedto receive and support one end of said shaft, a cap demountably securedto said base plate and cooperating with a fixed raised portion thereonto provide a bearing adapted to support the opposite end of the shaft,an operating handle secured to the shaft between said bearings wherebysaid shaft may be operated to actuate said crank, a keeper comprising abase plate having an outwardly projecting web thereon, and a cam faceonsaid web adapted to beJengaged by said crank to lock the door in closedposition, said cam face having a depression therein adapted to beengaged by said crank, when the door is in locked position. j

4. A door lock comprising a rock shaft provided at one end with a crankpin and also having an operating handle whereby said shaft maybeactuated, a support for securing the shaft to a door, a keeper adaptedto be secured to a fixed member and having an outwardly projecting webprovided with a cam face adapted to be engaged by said set my

